整行复选框被选中
Whole row of checkboxes being selected
我正在使用 Mat table 的示例来添加另一个带有复选框的列。当我单击一列时,其他列的复选框也会被选中。我如何正确实施它,以便仅选中特定列的复选框并对其进行跟踪。 https://stackblitz.com/edit/angular-aouc8q
我更新了代码。用您的代码替换此代码。
您需要为第二个复选框列单独 SelectionModel
。
table-selection-example.html
<table mat-table [dataSource]="dataSource" class="mat-elevation-z8">
<!-- Checkbox Column -->
<ng-container matColumnDef="select">
<th mat-header-cell *matHeaderCellDef>
<mat-checkbox (change)="$event ? masterToggle('one') : null"
[checked]="selection.hasValue() && isAllSelected()"
[indeterminate]="selection.hasValue() && !isAllSelected()"
[aria-label]="checkboxLabel('one')">
</mat-checkbox>
</th>
<td mat-cell *matCellDef="let row">
<mat-checkbox (click)="$event.stopPropagation()"
(change)="$event ? selection.toggle(row) : null"
[checked]="selection.isSelected(row)"
[aria-label]="checkboxLabel(row, 'one')">
</mat-checkbox>
</td>
</ng-container>
<!-- Position Column -->
<ng-container matColumnDef="position">
<th mat-header-cell *matHeaderCellDef>
<mat-checkbox (change)="$event ? masterToggle('two') : null"
[checked]="position.hasValue() && isAllSelected()"
[indeterminate]="position.hasValue() && !isAllSelected()"
[aria-label]="checkboxLabel('two')">
</mat-checkbox>
</th>
<td mat-cell *matCellDef="let row">
<mat-checkbox (click)="$event.stopPropagation()"
(change)="$event ? position.toggle(row) : null"
[checked]="position.isSelected(row)"
[aria-label]="checkboxLabel(row, 'two')">
</mat-checkbox>
</td>
</ng-container>
<!-- Name Column -->
<ng-container matColumnDef="name">
<th mat-header-cell *matHeaderCellDef> Name </th>
<td mat-cell *matCellDef="let element"> {{element.name}} </td>
</ng-container>
<!-- Weight Column -->
<ng-container matColumnDef="weight">
<th mat-header-cell *matHeaderCellDef> Weight </th>
<td mat-cell *matCellDef="let element"> {{element.weight}} </td>
</ng-container>
<!-- Symbol Column -->
<ng-container matColumnDef="symbol">
<th mat-header-cell *matHeaderCellDef> Symbol </th>
<td mat-cell *matCellDef="let element"> {{element.symbol}} </td>
</ng-container>
<tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
<tr mat-row *matRowDef="let row; columns: displayedColumns;"
(click)="selection.toggle(row)">
</tr>
</table>
<!-- Copyright 2019 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license -->
table-selection-example.ts
import {SelectionModel} from '@angular/cdk/collections';
import {Component} from '@angular/core';
import {MatTableDataSource} from '@angular/material';
export interface PeriodicElement {
name: string;
position: number;
weight: number;
symbol: string;
}
const ELEMENT_DATA: PeriodicElement[] = [
{position: 1, name: 'Hydrogen', weight: 1.0079, symbol: 'H'},
{position: 2, name: 'Helium', weight: 4.0026, symbol: 'He'},
{position: 3, name: 'Lithium', weight: 6.941, symbol: 'Li'},
{position: 4, name: 'Beryllium', weight: 9.0122, symbol: 'Be'},
{position: 5, name: 'Boron', weight: 10.811, symbol: 'B'},
{position: 6, name: 'Carbon', weight: 12.0107, symbol: 'C'},
{position: 7, name: 'Nitrogen', weight: 14.0067, symbol: 'N'},
{position: 8, name: 'Oxygen', weight: 15.9994, symbol: 'O'},
{position: 9, name: 'Fluorine', weight: 18.9984, symbol: 'F'},
{position: 10, name: 'Neon', weight: 20.1797, symbol: 'Ne'},
];
/**
* @title Table with selection
*/
@Component({
selector: 'table-selection-example',
styleUrls: ['table-selection-example.css'],
templateUrl: 'table-selection-example.html',
})
export class TableSelectionExample {
displayedColumns: string[] = ['select', 'position', 'name', 'weight', 'symbol'];
dataSource = new MatTableDataSource<PeriodicElement>(ELEMENT_DATA);
selection = new SelectionModel<PeriodicElement>(true, []);
position = new SelectionModel<PeriodicElement>(true, []);
/** Whether the number of selected elements matches the total number of rows. */
isAllSelected(which) {
if (which == "one"){
const numSelected = this.selection.selected.length;
const numRows = this.dataSource.data.length;
return numSelected === numRows;
} else if(which == "two"){
const numPosition = this.position.selected.length;
const numRows = this.dataSource.data.length;
return numPosition === numRows;
}
}
/** Selects all rows if they are not all selected; otherwise clear selection. */
masterToggle(which) {
if (which == "one"){
this.isAllSelected(which) ?
this.selection.clear() :
this.dataSource.data.forEach(row => this.selection.select(row));
} else if(which == "two"){
this.isAllSelected(which) ?
this.position.clear() :
this.dataSource.data.forEach(row => this.position.select(row));
}
}
/** The label for the checkbox on the passed row */
checkboxLabel(row?: PeriodicElement, which = "one"): string {
if (!row) {
return `${this.isAllSelected(which) ? 'select' : 'deselect'} all`;
}
return `${this.selection.isSelected(row) ? 'deselect' : 'select'} row ${row.position + 1}`;
}
}
/** Copyright 2019 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license */
希望此解决方案适合您。
我正在使用 Mat table 的示例来添加另一个带有复选框的列。当我单击一列时,其他列的复选框也会被选中。我如何正确实施它,以便仅选中特定列的复选框并对其进行跟踪。 https://stackblitz.com/edit/angular-aouc8q
我更新了代码。用您的代码替换此代码。
您需要为第二个复选框列单独 SelectionModel
。
table-selection-example.html
<table mat-table [dataSource]="dataSource" class="mat-elevation-z8">
<!-- Checkbox Column -->
<ng-container matColumnDef="select">
<th mat-header-cell *matHeaderCellDef>
<mat-checkbox (change)="$event ? masterToggle('one') : null"
[checked]="selection.hasValue() && isAllSelected()"
[indeterminate]="selection.hasValue() && !isAllSelected()"
[aria-label]="checkboxLabel('one')">
</mat-checkbox>
</th>
<td mat-cell *matCellDef="let row">
<mat-checkbox (click)="$event.stopPropagation()"
(change)="$event ? selection.toggle(row) : null"
[checked]="selection.isSelected(row)"
[aria-label]="checkboxLabel(row, 'one')">
</mat-checkbox>
</td>
</ng-container>
<!-- Position Column -->
<ng-container matColumnDef="position">
<th mat-header-cell *matHeaderCellDef>
<mat-checkbox (change)="$event ? masterToggle('two') : null"
[checked]="position.hasValue() && isAllSelected()"
[indeterminate]="position.hasValue() && !isAllSelected()"
[aria-label]="checkboxLabel('two')">
</mat-checkbox>
</th>
<td mat-cell *matCellDef="let row">
<mat-checkbox (click)="$event.stopPropagation()"
(change)="$event ? position.toggle(row) : null"
[checked]="position.isSelected(row)"
[aria-label]="checkboxLabel(row, 'two')">
</mat-checkbox>
</td>
</ng-container>
<!-- Name Column -->
<ng-container matColumnDef="name">
<th mat-header-cell *matHeaderCellDef> Name </th>
<td mat-cell *matCellDef="let element"> {{element.name}} </td>
</ng-container>
<!-- Weight Column -->
<ng-container matColumnDef="weight">
<th mat-header-cell *matHeaderCellDef> Weight </th>
<td mat-cell *matCellDef="let element"> {{element.weight}} </td>
</ng-container>
<!-- Symbol Column -->
<ng-container matColumnDef="symbol">
<th mat-header-cell *matHeaderCellDef> Symbol </th>
<td mat-cell *matCellDef="let element"> {{element.symbol}} </td>
</ng-container>
<tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
<tr mat-row *matRowDef="let row; columns: displayedColumns;"
(click)="selection.toggle(row)">
</tr>
</table>
<!-- Copyright 2019 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license -->
table-selection-example.ts
import {SelectionModel} from '@angular/cdk/collections';
import {Component} from '@angular/core';
import {MatTableDataSource} from '@angular/material';
export interface PeriodicElement {
name: string;
position: number;
weight: number;
symbol: string;
}
const ELEMENT_DATA: PeriodicElement[] = [
{position: 1, name: 'Hydrogen', weight: 1.0079, symbol: 'H'},
{position: 2, name: 'Helium', weight: 4.0026, symbol: 'He'},
{position: 3, name: 'Lithium', weight: 6.941, symbol: 'Li'},
{position: 4, name: 'Beryllium', weight: 9.0122, symbol: 'Be'},
{position: 5, name: 'Boron', weight: 10.811, symbol: 'B'},
{position: 6, name: 'Carbon', weight: 12.0107, symbol: 'C'},
{position: 7, name: 'Nitrogen', weight: 14.0067, symbol: 'N'},
{position: 8, name: 'Oxygen', weight: 15.9994, symbol: 'O'},
{position: 9, name: 'Fluorine', weight: 18.9984, symbol: 'F'},
{position: 10, name: 'Neon', weight: 20.1797, symbol: 'Ne'},
];
/**
* @title Table with selection
*/
@Component({
selector: 'table-selection-example',
styleUrls: ['table-selection-example.css'],
templateUrl: 'table-selection-example.html',
})
export class TableSelectionExample {
displayedColumns: string[] = ['select', 'position', 'name', 'weight', 'symbol'];
dataSource = new MatTableDataSource<PeriodicElement>(ELEMENT_DATA);
selection = new SelectionModel<PeriodicElement>(true, []);
position = new SelectionModel<PeriodicElement>(true, []);
/** Whether the number of selected elements matches the total number of rows. */
isAllSelected(which) {
if (which == "one"){
const numSelected = this.selection.selected.length;
const numRows = this.dataSource.data.length;
return numSelected === numRows;
} else if(which == "two"){
const numPosition = this.position.selected.length;
const numRows = this.dataSource.data.length;
return numPosition === numRows;
}
}
/** Selects all rows if they are not all selected; otherwise clear selection. */
masterToggle(which) {
if (which == "one"){
this.isAllSelected(which) ?
this.selection.clear() :
this.dataSource.data.forEach(row => this.selection.select(row));
} else if(which == "two"){
this.isAllSelected(which) ?
this.position.clear() :
this.dataSource.data.forEach(row => this.position.select(row));
}
}
/** The label for the checkbox on the passed row */
checkboxLabel(row?: PeriodicElement, which = "one"): string {
if (!row) {
return `${this.isAllSelected(which) ? 'select' : 'deselect'} all`;
}
return `${this.selection.isSelected(row) ? 'deselect' : 'select'} row ${row.position + 1}`;
}
}
/** Copyright 2019 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license */
希望此解决方案适合您。